// Copyright (C) Kumo inc. and its affiliates.
// Author: Jeff.li lijippy@163.com
// All rights reserved.
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published
// by the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program.  If not, see <https://www.gnu.org/licenses/>.
//


#pragma once

#include <memory>

#include <pollux/common/base/exceptions.h>

namespace kumo::pollux {
    /// Used to dynamically cast a unique pointer from 'SourceType' to
    /// 'DestinationType'. The raw object is moved from 'srcPtr' to 'dstPtr' on
    /// success. The function throws if the cast fails, and the raw object is also
    /// freed.
    template<typename SourceType, typename DestinationType>
    inline void castUniquePointer(
        std::unique_ptr<SourceType> &&srcPtr,
        std::unique_ptr<DestinationType> &dstPtr) {
        auto *rawSrcPtr = srcPtr.release();
        POLLUX_CHECK_NOT_NULL(rawSrcPtr);
        try {
            auto *rawDstPtr = dynamic_cast<DestinationType *>(rawSrcPtr);
            POLLUX_CHECK_NOT_NULL(rawDstPtr);
            dstPtr.reset(rawDstPtr);
        } catch (const std::exception &) {
            srcPtr.reset(rawSrcPtr);
            throw;
        }
    }
} // namespace kumo::pollux
